Q: Bluetooth problem with OSX Yosemite: Magic Mouse and Keyboard

I have the same issue here! The long pause and then reconnection of my magic mouse - very annoying! Not to mention that bluetooth is still very spotty when connected to other devices. I'm using a mid 2014 15" MBP

If anyone finds a fix to this please let me know also.

10.10.4 update has not fixed this problem.

Same issue with my keyboard. It's been this way for months. Applications hang, bluetooth is unbearable... Yosemite has turned this machine into a second rate product.

This worked for me. Thanks for the pro tip.

This is EXACTLY what is happening to me. I have a brand new 13" Macbook Pro Retina and I notice it most when Safari websites are loading. It's horrible. I replaced a PC with this computer because Apple products were always so great, and now I want to go back to my PC because it makes the the whole user experience just awful. I must admit that I'm pretty disappointed in Apple with this.

Giving up!  Just pulled out two of the older USB Apple keyboards and USB mice...  I have two MBP Retina 15" laptops connected to Apple 27" screens in clamshell mode, and can't get a reliable bluetooth connection to save my life - it has actually gotten a lot worse over the last few days than ever before.  Thanks Apple!

Yesterday I removed all bluetooth devices, and deleted com.apple.Bluetooth.plist in /Library/Preferences/ ; and restart the computer.

I can say it's "better" now after repairing all.

To newbies to this problem -> this helps (at least in my case):

1) use the 2.xGhz network, not the 5Ghz one (the 5Ghz connection is not reliable / breaking / interfering)

2) move mouse cursor to bluetooth icon in the panel, click.

3) Chose your mouse and click connect

4) Then quickly move the cursor to WIFI icon, click on it.

5) wait a little, while waiting, turn on (or turn off and turn on again) the bluetooth mouse

6) Quickly click the physical mouse buttons

7) It should connect

I did this about 30 minutes ago when I was getting a pretty bad delay while trying to use InDesign. Deleted everything in my Network Connections that wasn't being used and it seemed to alleviate the issue. Everything being my WiFi connection (I use hardline) and PAN (Phone).

This seems very stupid, lame and dumb, but my very bad magic mouse delays and lags where resolved by using a mouse pad! I'm not kidding either.

Weird, but worked.

Problems with my magic mouse

I have also problems with my magic mouse. I have operating system  Yosemite X 10.10.5.

Since a few days my magic mouse doesn't function good anymore.

It goes on and on saying: no connection, connection, no connection, etcetera.

It drives my crazy.

I have tried different kind of alkaline batteries but that makes no difference. The problem stays!

Who can help me??

Sincerely, Kees Dings

Yeah, I can confirm that I generally am having really good signal strength, yet it lags. All possible interference is FAR from even the other side of the MBP. I think it's a driver issue when it comes to Magic Mouse. I have 2 and both do the same thing. It MAY be a problem with the firmware in the actual mouse itself, but no way of knowing. It's quite annoying. I had the problem on my old bluetooth chip, then I upgraded the chip so I could have hand-off, but this chip does it too. No, disabling wifi, or Bluetooth PAN, or hand-off, or changing (brand-new) batteries, or new mousepad (actually, that sometimes DID help, but that's for other reasons), or jumping up and down and twirling your tongue around your nose, or SMC reset, or PRAM reset DO NOT WORK!  It's a software issue. "SmoothMouse" seems to help slightly, but it just creates a really fast laggy cursor. I've also read that this happens with Logitech mice, and in my experience, even having it right up next to the laptop has also resulted in the same problems.  Additionally, the keyboard does have some issues (occasionally) with laggy typing, but again, I'm not convinced that it's a signal strength error. MAYBE interference with wifi, but   still have the same problem  when wifi is off. MAYBE hard drives, but I have this problem even when I'm at my coffee table.

You should be able to use a keyboard tray that slides under your desk and have the bluetooth be fine. You should also be able to use a laptop riser. These are basic things that just make sense, given the money we pay. (I paid $3,500 for my laptop back in 2011). This is ridiculous. Less than 2 feet away, nothing at all should cause any signal degradation, much less a wooden desk. Also, I use MacID to auto-lock my macbook pro when I walk away (yes, I've even disabled that and no it doesn't solve it) and I can tell that the mac bluetooth chip screws up even with that, because it often says "about to lock computer, due to proximity).  SO yes, maybe interference, but I don't think it's necessarily just that.

I'm on 10.10.5 and the issue resolved itself somehow along the way, just the usual Apple updates so there is hope. Hopefully El Captain doesn't break it again, just in case will wait until a couple updates before upgrading, was burnt with Yosemite

Another who's been completely bewildered by this.  Even purchased another trackpad thinking there had to be something (mechanically) wrong with the one I had.  Sigh.

So far, disabling Handoff seems to have worked this time.  I've tried everything else a bazillion times and while it may work briefly (one use) I end up with the unable to connect again.

Just noticed that the toolbar BT icon states that BT is off, the system panel says it's on when this is happening.  Not sure which to believe, know that it simply doesn't work.  (external trackpad on 2015 MBP)